查看AlertDialog的源代码，如下：
/**
* Set a listener to be invoked when the positive button of the dialog is pressed.
* @param textId The resource id of the text to display in the positive button
* @param listener The {@link DialogInterface.OnClickListener} to use.
*
* @return This Builder object to allow for chaining of calls to set methods
*/
public Builder setPositiveButton(int textId, final OnClickListener listener) {
P.mPositiveButtonText = P.mContext.getText(textId);
P.mPositiveButtonListener = listener;
return this;
}
public Builder setPositiveButton(CharSequence text, final OnClickListener listener) {
P.mPositiveButtonText = text;
P.mPositiveButtonListener = listener;
return this;
}
public Builder setNegativeButton(int textId, final OnClickListener listener) {
P.mNegativeButtonText = P.mContext.getText(textId);
P.mNegativeButtonListener = listener;
return this;
}
public Builder setNegativeButton(CharSequence text, final OnClickListener listener) {
P.mNegativeButtonText = text;
P.mNegativeButtonListener = listener;
return this;
}
注意看注释第一句：Set a listener to be invoked when the positive button of the dialog is pressed，这个Listener是监听button被点击事件。我们的目的是让AlertDialog 在点击确定或者取消时不消失，那么屏蔽此Listener即可。
解决方法：
继承AlertDialog自定义自己的AlertDialog，重写以上四个方法：(把这四个方法拷贝过来，都不要这两句：
P.mPositiveButtonListener = listener;
P.mNegativeButtonListener = listener;）
此外还有不常用的这个按钮，如法炮制。
public Builder setNeutralButton(int textId, final OnClickListener listener)
public Builder setNeutralButton(CharSequence text, final OnClickListener listener)
其他不同的解决方法：http://blog.csdn.net/abby_dcy/article/details/6049535